Abstract: Improved endosseous and subperiosteal dental implants are obtained by providing the lower substructure of such implants with an adherent coating or reservoir of a calcium compound.

Abstract: Anti-snow and anti-ice protection for horses hooves in which an insert is provided in the horse-shoe and part of the elastically deformable U-shaped insert conforming to and coextensive with the inside edge of a horseshoe and in resilient engagement with the sole of a horse's hoof is partly clamped between the horse-shoe and the sole of the hoof.

Abstract: A halter for training horses includes circumferentially expandable and contractible loops for encircling a horses head and nose. Reins operatively and integrally interconnect the loops so that tension applied thereto results in simultaneous circumferential contraction of the loops. Both loops include protuberances strategically located to apply concentrated pressure to selected sensitive areas of the head and nose in response to pulling force on the reins.

Abstract: A dental handpiece and a wrench adapted to be used in combination with the handpiece for securing a dental bur in the handpiece. The handpiece includes a turbine housing, a rotor shaft and a collet threadedly secured in the rotor shaft. The wrench has a plurality of fingers which are adapted to be received in the rotor shaft, and a shaft rotatably mounted in a tube from which the fingers project. The wrench shaft is adapted to threadedly advance or retract the collet relative to the rotor shaft.

Abstract: An air driven dental handpiece comprising a handle and a turbine housing mounted at one end thereof. The turbine housing includes a rotor having rotor blades and ball bearings for rotatably mounting the rotor. A port is formed in the handle, which is in fluid communication with the interior of the turbine housing. A lubricant is injected into the turbine housing through the port. Removable sealing means cover the port to prevent any foreign matter from entering the turbine housing and to prevent air from leaving the port.

Abstract: A dental clutch member molded in the form of a thin-walled shell fits over the person's lower teeth and is attached thereto by plaster. Holes in the walls of the shell help the plaster become firmly attached to the shell. Support structure molded integral with the shell extends outwardly through the patient's mouth for receiving a horizontal rod to which is attached other dental apparatus. Fracture lines in the shell and the extension permit the shell to be broken into pieces to facilitate removal of the clutch from the patient. One or more tooth separators are molded with the clutch member and then broken away from the shell to be releasably attached to the clutch by detent buttons.

Abstract: A sulky hitch in the form of a generally wishbone-shaped or Y-shaped assembly having two rearwardly diverging tubular members attached to the cut-off forward ends of the conventional shafts of a sulky, upwardly and inwardly curving portions contoured to the hind quarter area of a horse and a forwardly and downwardly extending member attached to an upstanding post on the forward portion of the horse's back.

Abstract: In an orthodontic tooth positioning appliance of the type wherein all teeth normally engage the isthmus of the tooth receiving troughs substantially concurrently, the thickness of the isthmus is either (a) increased at the anterior teeth, relative to the thickness at the posterior teeth, for correcting or preventing relapse of a correction for overbite or (b) decreased at the anterior teeth, relative to the thickness at the posterior teeth to correct for or prevent relapse of a correction for open bite.

Abstract: A toy which may be spun about on a flat surface and which is intended to be activated by a sharp pointed rod or pencil. The toy is characterized by a disklike body having a circular rim which is disposed on the bottom thereof and runningly engages the flat surface as the toy is caused to be activated. An upwardly directed concentrically disposed socket is included for guidingly receiving the sharp end of the rod. A downwardly directed intermittent force suitably applied to the rod causes the toy to wobble about indefinitely on the flat surface, i.e., subsequent to the toy's first having been manually started to wobble. Weight may be added to the toy adjacent the periphery thereof to facilitate the wobble spinning action.

Abstract: A take-apart wooden toy which, when assembled, variably resembles any of a number of different devices. Such toy comprises a kit, having a number of interchangeable parts and common characteristics, designed to be taken apart and assembled by a young child and including the following common parts: at least one body member with circular apertures or threaded sockets which defines the assembled toy's shape and character; standard bolts or studs with threaded portions on both ends thereof and a smooth portion in between; standard nuts for mating with the bolts; and a plurality of accessory members of different types for further defining the shape of the assembled device. The accessory members may include axle members and standard wheels which fit rotatably on the bolts, and elongated bar members which fit loosely on the bolts or studs.

Abstract: The invention comprises a toy or model vehicle having ground wheels, of which at least one is formed with a cam or lobe that cooperates with a pivotable or reciprocable member mounted in the vehicle, or with an intermediate member transmitting such motion, whereby such items as simulated engine pistons, toy figures of beasts and men, gun turrets and so on may be given movement during travel of the vehicle over a surface.

Abstract: An articulated toy figure has head, limb, and hip portions each jointed for pivotal motion. The hip portion is formed by a flat plate which is positioned adjacent to the bottom of the figure's torso, and is supported for rotation about the longitudinal axis of the torso. This hip plate has tab means extending normally from the bottom surface thereof, these tab means having knobs extending therefrom over which the upper leg portions fit in pivotal mating engagement. The upper leg portions of the figure, which are joined at one end thereof as just described to the hip plate, and are joined at the other end to the lower leg portions of the figure, have similar recessed joinder portions at each end, these joinder portions having receptacles formed therein into which knobs of the hip plate tab means and lower leg end portions matingly fit for relative pivotal motion.

Abstract: A dental handtool in which an extended sleeve has at its center, a driving shaft for rotary movement of the tool used for dental treatment. The driving shaft is at one end of the sleeve, and a freely rotating driving part is attached to the handtool at the opposite end of the sleeve. A coolant pipe between the driving part and the handtool, feeds coolant to the treatment area of the dental tool.

Abstract: An assembly of a multiplicity of thin wood boards each having parallel grooves in one face from edge to edge thereof, and the opposite face being ungrooved, is held together by one or more rods extending through the several boards, the grooved face of each board facing the smooth face of an adjacent board. At the ends of the assembly, cupped spring plates engage the outermost surfaces of the boards and nuts threaded on the rod ends apply pressure on the plates to hold the board surfaces in contact. There is a flexible thin strip of adhesive covering one end of each of the grooves and adhered to the board edges at that end of the grooves and to the adjacent side edges of the boards.

Abstract: A method of forming a porcelain crown that requires no shoulder, and can be fitted over any type of standard impression made by a dentist. In the method, a laboratory plaster model is made from a dentist's impression and includes male and female dies. The male die has successive layers of materials applied thereupon comprising first a 0.002 gauge platinum film followed successively by a first layer of gold crust, a second layer of gold crust and opaque porcelain, upon which a regular porcelain is applied that fits the female die with the regular porcelain receiving thereafter a final application of glazing powder. The crown is baked between each step of the process.

Abstract: A dental model cast includes an impression of at least one tooth and a substantially flat surface opposingly disposed relative to the tooth impression. The dental model cast is in the form of a plurality of segments. Each of the segments is removably mounted on a base cast and can be replaced in their original positions thereon. Extending from the flat surface of each segment is an elongate brass pin which is provided with a tapered free end. Each segment is also provided with a shorter tapered or conical pin which is made from an elastomeric material such as polyethylene. The base casting is provided with a polyethylene sleeve configurated to receive a portion of the tapered brass pin which extends beyond the flat surface. A tapered or conical opening is provided in the base cast which is configurated to receive the shorter tapered pin.

Abstract: The patient simulator provides a skull with a mandible and maxilla relatively arranged and supported for movement simulating that of a human mandible and maxilla, and having a skin covering with the natural appearance and "feel" of the human skin. The simulator additionally includes a resilient tongue, and soft palate or velum which with the skin covering defines the mouth cavity. With practice dentures releasably secured to the mandible and maxilla the dental student can practice on various tooth conditions under substantially normal working conditions.

Abstract: An improved dump mechanism for a toy truck includes a dump lever having an upper surface curving downward toward the lifting end of the dump lever to engage an undersurface of the dump body. The curved surface of the dump lever is shaped for pivoting the dump body in increments that increase successively relative to corresponding successively equal pivotal increments of the dump lever throughout at least the initial half of the motion of the dump body from a load position to a full-dump position. This makes the pivoting of the dump body with the dump lever relatively easy with approximately even torque on the dump lever throughout the dumping motion.

Abstract: A coupling member for a toy vehicle drive system that may be employed in various play situations. The coupling member is generally comprised of an exaggerated triangularly-shaped portion and a funnel-shaped portion. The exaggerated triangularly-shaped portion allows the toy vehicle to be driven forward and backward, and also allows it to complete a U-turn and to be disengaged from the drive chain of the drive system. The funnel-shaped portion ensures that the toy vehicle may be engaged by the driven chain when the child desires to drive the toy vehicle in its forward direction.

Abstract: A reinforced orthodontic bracket constructed of a translucent plastic for direct application to a patient's tooth as by an adhesive where the translucent bracket itself has a metallic reinforcement imbedded therein for added structural strength for the prevention of a displacement of the bracket because of forces applied by an arch wire attached thereto.